M2 Antenna Systems 41-3BB User manual

M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
Tel: [phone] Fax: [phone] Web: www.m2inc.com
©2015 M2 Antenna Systems Incoporated 06/09/15
Rev.00
M2 Antenna Systems, Inc.
Model No: 41-3BB
Model .........................................41-3BB
Frequency Range.......................40.6-41.70 MHz
*Gain ..........................................7.69 dBi
Front to back ..............................19 dB Typical
Beamwidth ...............................E=60°
Feed type ...................................Hair Pin Match
Feed Impedance. .......................50 Ohms Unbalanced
Maximum VSWR........................1.5:1
Input Connector..........................“N” Female
Power Handling ..........................1.5 kW
Boom Length / Dia......................107” / 2”
Maximum Element Length..........172”
Turning Radius: ..........................101”
Stacking Distance.......................N/A
Mast Size....................................2” Nom.
Wind area / Survival ...................1.5 Sq. Ft. / 100 MPH
Weight / Ship Wt.........................35 Lbs. / 40 Lbs.
FEATURES:
The 41-3BB has been computer optimized from the ground up for gain and pattern covering 40.6-41.7
MHz. The original design was for the USDA / NCRS Soil Monitoring systems, but the 41-3BB can also be used for Me-
teor Scatter applications. The custom 1:1 Fairite balun and low loss hairpin match help maintain high efficiency. Ele-
ment ring clamps and other important components are CNC machined for maximum strength and electrical integrity. All
antenna hardware is stainless steel and the u-bolts for mounting are zinc plated.
M2 Antenna Systems, Inc. has well over 30 designs for Meteor Scatter applications covering from 39 MHz to 50
MHz. If you have a specific requirement, please contact us for more details.
SPECIFICATIONS:
*Subtract 2.14 from dBi for dBd

41-3BB DIMENSION SHEET
TOOLS REQUIRED: Screwdriver, 11/32 wrench, socket or spintite, a 7/16" and 1/2" wrench or socket, tape measure.

41-3BB ASSEMBLY DETAIL

41-3BB PARTS & HARDWARE
DESCRIPTION......................................................................................... QTY
BOOM SECTION #1: 2” X .125 X 60” SOE.............................................. 1
BOOM SECTION #2: 2” X .125 X 51” ...................................................... 1
DE ELEMENT CENTER, 1.0” X .058 X 12 SOE” .................................... 2
ELEMENT TIPS, 3/4” X .049 X SEE SHEET .......................................... 6
FIBERGLASS DE CENTER, 7/8” X 14.75” (M2AFG0048)....................... 1
ELEMENT SLEEVE, 7/8” X .058 X 30.00” ............................................... 2
RING CLAMP 2”....................................................................................... 3
HAIRPIN SHORT BAR............................................................................. 1
HAIRPIN SHORT BAR SPACER, 3/8” X 7/8” .......................................... 1
HAIRPIN TUBE 3/8” X 30.25” .................................................................. 2
DE 3/8” CLAMP BLOCK, 1” X .250 X 1.250” (M2AMC0261) ................... 4
BALUN PLATE, 1/8” X 2.0 X 4.0”............................................................. 1
BOOM TO MAST PLATE, 6” X .250 X 8” ................................................. 1
(3) FAIRITE 1:1 VHF BALUN ASSEMBLY WITH LEADS ...................... 1
BAND CLAMP WITH HOLE, 2 TO 2-1/2”................................................. 1
PENETROX / ZINC PASTE CUP............................................................. 1
ASSEMBLY MANUAL .............................................................................. 1
HARDWARE:
U-BOLT AND CRADLE, 3”....................................................................... 2
U-BOLT AND CRADLE, 2”....................................................................... 6
U-BOLT AND CRADLE, 1-1/2”................................................................. 1
LOCKWASHER,3/8,SS ............................................................................ 4
NUT,3/8-16,SS......................................................................................... 4
LOCKWASHER,5/16,SS .......................................................................... 14
NUT,5/16-18,SS....................................................................................... 14
BOLT,1/4-20X2.5,HEX HD,SS ................................................................. 2
BOLT,1/4-20X2.0,HEX HD,SS ................................................................. 5
BOLT,1/4-20X1.75,HEX HD,SS ............................................................... 4
BOLT,1/4-20X1.0,HEX HD,SS ................................................................. 3
SET SCREW,1/4-20X.250,SS.................................................................. 2
LOCKNUT,1/4-20,SS ............................................................................... 14
SCREW,8-32X1.25, PH PHL,SS.............................................................. 4
LOCKNUT,8-32,SS .................................................................................. 4
ALLEN KEY, 1/8” ..................................................................................... 1
M2 ANTENNA SYSTEMS, INC.
4402 N. SELLAND AVE.
FRESNO, CA 93722
[phone] FAX: [phone]
www.m2inc.com Email: [email protected]